Minimization of maximum electric field in high-voltage parallel-plate capacitor

Minimization of maximum electric field of a parallel-plate capacitor for high-voltage and temperature stable applications is presented. Cubic zirconia is used as a dielectric material because of its high relative permittivity, high dielectric strength and high temperature stability. The maximum electric field present in the structure limits the maximum achievable capacitance of the capacitor structure. Reducing the maximum electric field of the capacitor allows to reduce the thickness of the dielectric material, which increases its capacitance. The impact of geometrical and electrical parameters of the parallel-plate capacitor on the maximum electric field is analyzed by a 2D multiphysics solver. The guidelines for the minimization of the maximum electric field are given.